Development of a Povarov Reaction/Carbene Generation Sequence for Alkenyldiazocarbonyl Compounds
作者:Appaso Mahadev Jadhav、Vinayak Vishnu Pagar、Rai-Shung Liu
DOI:10.1002/anie.201205692
日期:2012.11.19
Rings aplenty: A HOTf‐catalyzed (Tf=trifluoromethanesulfonyl) Povarovreaction of alkenyldiazo species has been developed and delivers diazo‐containing cycloadducts stereoselectively (see scheme). The resulting cycloadducts provide access to six‐ and seven‐membered azacycles through the generation of metal carbenes as well as the functionalization of diazo group.
Asymmetric [3 + 1]-Cycloaddition Reaction via Diazo Discrimination
作者:Yong Xu、Zhen Wang、Jiangtao Sun
DOI:10.1021/acs.orglett.1c02825
日期:2021.10.1
1]-cycloaddition of two structurally different diazo compounds has been achieved using chiral bisoxazoline copper(I) complexes as a catalyst, providing a novel route for the synthesis of cyclobutenes containing a quaternary stereocenter. Typically, this reaction represents the first example of asymmetric cross-electrophile coupling of two diazo substrates via carbene discrimination.
<i>gem</i>-Difluoro-Masked <i>o</i>-Quinone Methides Generated by Photocatalytic Radical (3+3) Annulation and Their (4+1) Cycloaddition with Sulfur Ylides